president obama and first lady, michelle obama on the way to boston moments ago departing the white house on the south lawn. they're set to the attend an interfaith service of the bombing victims at the cathedral of the holy cross a mile from our location on boylston street. while the nation will pause to remember. senator john mccain is saying that the events in boston may provide a valuable lesson. >> that is certainly a wake-up call. every time there is an act like this americans obviously lead to more security to prevent another catastrophic event. and then we have a tendency, and it is understandable, to become a little bit complacent. but i think it is a cautionary lesson here we really can't let our guard down. bill: after at crazy day yesterday and information ping-ponging throughout the streets of boston what we can tell you today that the fbi is considering releasing what we call, still images captured images from surveillance video cameras a quarter mile down the road here at the finish line from around 2:0, 2:45, 2 len 50 in the afternoon on monday. when the press conference h